Gun sight mounting



E53-#2523 OR 295780386 Si? Dec. 11, 1951 H, A WlLLlAMS 2,578,386

GUN SIGHT MOUNTING Filed March 12, 1949 E INVENTOR.

Patented Dec. 11, 1951 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to gun sight mountings generally and more particularly to a novel elevetion and windage setting adjustment for the sight which is incorporated into the mounting. The application is a continuation in part of the inventors copending application No. 20,051, iiled April 9, 1948, entitled Gun Sight Mounting which is now held abandoned.

Heretofore, receiver sight mountings have been provided with elevation and Windage adjustments which for their setting depended upon relatiyely large knurled knobs extending outwardly from the mounting, itself. These knobs are not only unsightly and cumbersome, but are subject to either accidental displacement from a xed setting or undesirable displacement by unwarranted tampering therewith on the part of unauthorized parties. By means of the novel provision of the present invention, the foregoing disadvantages have been eliminated and a more desirable gun sight mounting has been provided in which substantially permanent elevation and Windage adjustments may be made and maintained.

An object of the present invention, therefore, is to provide a novel gun sight mounting.

Another object of the invention is to provide in a receiver sight mounting novel elevation and windage adjustment features by means of which external knobs, heretofore required, have been eliminated.

A further object is to provide a novel mounting for a receiver sight in which the adjustment members for the different necessary settings, such as elevation and windage settings, are in a plane flush with or slightly below the outer portion of the mounting so that accidental displacement of the settings is prevented.

Another object is to provide in a receiver sight mounting, a novel locking expedient embodying a click for maintaining a desired adjustment for either elevation or windage settings or both.

A still further object is to provide a novel receiver sight mounting in which the transverse portion of the mounting supporting the sighting member is supported at both of its ends on the receiver.

Another object is to provide a novel receiver sight mounting in which the outer ends of the arm which embody the windage and elevation adjustment screws are of greater thickness than the central portion of the arm so that a mounting is thereby provided which possesses fewer parts and is considerably stronger and less expensive to construct than prior mountngs.

Other objects and advantages of the invention will become apparent from the following specication, the accompanying drawings. and the appended claim.

In the drawings, wherein like reference characters refer to like parts throughout the several views:

Fig. 1 is a side elevation of a form of the invention.

Fig. 2 is a plan view of the form of Fig. 1.

Fig. 3 is a vertical section taken on line 3-3 of Fig. 1.

Fig. 4 is a cross section taken on line 4-4 of Fig. 3; and

Fig. 5 is a cross section taken on line 5-5 of Fig. 4.

As shown in Figs. 1-5 the mounting block |0|. which is suitably secured to the side of the receiver (shown in dotted lines), has a lengthwise dovetail slot |03 opening Vinto its outer face |05. A leg |01 of the L-shaped bracket member |09 is iitted to and slidable in the slot |03 so that the bracket is restrained against all but vertical or elevational adjustment. The4 leg |01 is held in fixed vertical position by means of a movable Wedge block I I that is transversely slidable in an aperture ||3 in the block |0| which opens into the slot |03. The wedge which is preferably of general cylindrical form, has an inclined face which engages at ||5 with the inclined edge of the leg |01. A screw ||1 extends through the block and threads into the mounting block |0| and provides means whereby the Wedge block may be tightly forced against the leg |01 to rigidly interconnect the bracket |09 and the mounting block |0|.

The bracket member |09 is adjusted in elevation by means of the screw IIS, this being done of course when the screw |1, and thus the wedge has been loosened. The screw ||9 extends through a suitable aperture |2| that is formed in the other leg |23 of the bracket |09 and threads into the mounting block |0|. The stub end |25 of the screw ||9 is totally housed within the aperture |2| and may have slots |21 whereby it receives torque.

The gun sight |29 is carried by the leg |23 and is movable lengthwise thereof in order to provide Windage adjustment. Thus, it slides on the surface of the leg |23 but has a portion |3| which extends downwardly into a lengthwise slot |33 that is formed in the leg |23. An adjusting screw |35 threadably extends through the sight portion |3| and is journaled at each end in apertures |31 and |39 that open into the inner ends and the outer or free end of the slot |33, respectively. 'I'he stub end 4| of the screw |35 is totally housed within the bore |39 and may have slots |43 whereby it receives-torque.

The stub ends |25 and |4| of the adjusting screws ||9 and |35 are adapted to provide the usual click and also to serve as means whereby axial movement of the screws is prevented. For

this purpose the periphery of each stub end,

which may be enlarged as shown, in which case the ends of the leg |23 are also enlarged, has an annular groove |45 and a plurality of angularly spaced detent recesses |41 in the plane of the groove |45. A pin |49 is provided for each groove and these may be formed lon the ends of set screws which thread into the edges of the leg |23. The pins |49 serve to prevent axial movement of the adjusting screws Without interfering with rotation thereof but by tightening of the screws |5| may be forced against the groove to prevent rotation. Spring pressed detents |53 for the recesses |41 provide the click and, to facilitate manufacture, these are preferably housed in apertures |55 that are diametrically opposite the pins |49.

While bracket |09 is rigidly supported by block |0|, leg |23 thereof, may extend unsupported over the receiver. For this reason, the free end of leg |23 is provided with a threaded bore and a screw |51 therein, as shown in Figure 3, which may be adjusted to engage the receiver and thereby provide leg |23 with two points of support.

It will now be apparent to those skilled in the art, that after the gun sight |29 has itself been properly adjusted the windage and elevation settings may be readily performed. For achieving the proper adjustment of the sight in elevation, the wedge is rst loosened and then the 'screw I9 is rotated by means of a suitable tool to raise or lower bracket |09 relative to block |0| and the receiver. On turning of screw ||9, detent |53, when engaged by a high point of stub end is camrned or retracted into its cavity against the action of its spring and as soon as the high point or outer periphery of head |25 passes the detent, the latter is pressed by its spring to engage with the next succeeding recess |41. If the desired setting has been attained, the detent by engagement'with its recess will hold the screw I9 against displacement. During this adjustment the pin |49 by engagement with groove |45 prevents axial movement of the screw ||9 Arelative to the leg |23. The windage can be adjusted in a similar manner by rotation of screw It will be observed that the mounting is formed of a minimum number of parts which require relatively few machining operations. The bracket or main support is formed of a single L- shaped bracket rather than several separate pieces, as is often the case. The horizontal arm |23 of the bracket is of substantial thickness and is of greater thickness at each end with the result that it can entirely house the headsof the adjusting screws and is of substantial .strength and improved appearance. As a further measure to increase strength and rigidity, the support screw |51 and the dovetail connection |05 with the wedge block are provided. The bores for set screw |5| and detent |53 are aligned with the result that they can be drilled at the same time and the set screw bore subsequently tapped to form the thread, thus reducing machining operations. Other advantages and features will be apparent to those familiar with gun sights.

It will be evident that various detailed changes may be made in the specific device illustrated without departing from the spirit or scope of the invention.

What is claimed is: In a gun sight mounting, the combination of a supporting bracket, a block member to be mounted on the gun, a. peep sight member, each of said members being connected to said bracket for ,sliding movementrelative to the bracket in directions at right angles to each other respectively, separate means for adjustably fixing each member'relative to the bracket, at least one of said means includingy an adjusting screw journaled in the bracket and threaded into one of said members, said screw having an enlarged head and said bracket having a countersunk screw receiving opening with the screw head positioned within the enlarged portion of the opening, said screw head being provided with click recesses spaced circumferentially about the axis of the screw, said screw head being provided with a circumferential retaining groove intersecting the click recesses and lying in the same transverse plane, said bracket having a blind hole intersecting the screw axis and with portions extending radially on opposite sides of said countersunk opening and located in the transverse plane of said groove, both said hole portions opening into said opening'and one terminating at its outer end within said bracket andthe other opening at its outer end at a face of the bracket, a spring pressed click detent mechanism in said one hole portion vconfined between the bottom of said hole and the bottoms of said click recesses, and a retaining set screw threadedinto the other hole portion and having one end fitting in said groove and the vother end accessible from the face of said bracket into which said hole portion opens.

` HARVEY A. WILLIAMS.

REFERENCES CITED The-following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 541,559 Lyman June 25, 1895 717,478 Wesson Dec. 30, 1902 Y 995,726 Windridge July 11, 1911 1,970,623 Redfield Aug. 2l, 1934 1,997,584 Howard Apr. 16, 1935 2,005,866 Lowe June 25, 1935 2,148,272 Kyle Feb. 2l, 1939 2,211,953 Kuhn Aug. 20, 1940 2,250,109 King July 22, 1941 FOREIGN PATENTS Number Country Date 584,141 France 1924 Certiicate of Correction f Patnt No. 2,573,386 December ,11, 1951 HARVEY A. WILLIAMS It is hereby certified that error appears in the printed specification of the above numbered patent requiring correctmn as follows:

Column 4, line 58, list of referencs cited` for 995,726 read .997,726

` and vthat the said Letters Patent should bo read as corrected above, so that the eamo may conform to the record of the case in the Patent Ofce.

Signed and sealed this 1st, day of April` A. D. 1952.

THOMAS F. MURPHY,

Assistant Uanmssoner of Patents. 4 

